defmodule ExFinancialModelingPrep do
  @moduledoc """
  Documentation for `ExFinancialModelingPrep`.
  """

  alias ExFinancialModelingPrep.Api.{
    StockFundamental,
    StockLookUpTool
  }

  @callback s_and_p_500_companies() :: {:ok | :error, any()}
  @callback income_statement(binary(), Keyword.t()) ::
              {:ok, IncomeStatement.t()} | {:error, any()}
  @callback financial_statement_list() :: {:ok | :error, any()}
  @callback balance_sheet_statement(binary(), Keyword.t()) :: {:ok | :error, any()}
  @callback cash_flow_statement(binary(), Keyword.t()) :: {:ok | :error, any()}
  @callback search(binary(), Keyword.t()) :: {:ok | :error, any()}

  def s_and_p_500_companies, do: impl(:market_indexes).s_and_p_500_companies()

  @doc delegate_to: {StockFundamental, :financial_statement_list, 0}
  def financial_statement_list, do: impl(:stock_fundamental).financial_statement_list()

  @doc delegate_to: {StockFundamental, :income_statement, 2}
  def income_statement(ticker, opts), do: impl(:stock_fundamental).income_statement(ticker, opts)

  @doc delegate_to: {StockFundamental, :balance_sheet_statement, 2}
  def balance_sheet_statement(ticker, opts \\ []),
    do: impl(:stock_fundamental).balance_sheet_statement(ticker, opts)

  @doc delegate_to: {StockFundamental, :cash_flow_statement, 2}
  def cash_flow_statement(ticker, opts \\ []),
    do: impl(:stock_fundamental).cash_flow_statement(ticker, opts)

  @doc delegate_to: {StockLookUpTool, :search, 2}
  def search(ticker_or_company, opts \\ []),
    do: impl(:stock_lookup_tool).search(ticker_or_company, opts)

  defp impl(module), do: Application.get_env(:ex_financial_modeling_prep, :impl)[module]
end